<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/chinese-gradient">
    <title>朋友圈九宫格</title>
</head>
<style>
    .box {
        width: 500px;
        height: 500px;
    }

    ul {
        width: 100%;
        height: 100%;
        padding: 0;
        margin: 0;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
        align-items: space-around;
    }

    li {
        list-style: none;
        width: 30%;
        height: 30%;
        background-color: skyblue;
        text-align: center;
        vertical-align: middle;
        border-radius: 5px;
    }
</style>

<body>
    <div class="box">
        <ul>
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
            <li>5</li>
            <li>6</li>
            <li>7</li>
            <li>8</li>
            <li>9</li>
        </ul>
    </div>
</body>

</html>